WebAPI - Posting to dictionary with json

I have a web api method that looks like this:

[HttpPost] [Route("messages")] public IHttpActionResult Post(IEnumerable<Email> email) { AddToQueue(email); return Ok("message added to queue"); } 

My Email class looks like this currently:

public string Body { get; set; } public string From { get; set; } public string Template { get; set; } public string To { get; set; } public string Type { get; set; } 

And I'm posting to my Post method using fiddler, like this:

User-Agent: Fiddler Host: localhost:3994 Content-Length: 215 Content-Type: application/json; charset=utf-8 [ {"Body":"body","From":"from","To":"to","Template":"template"}, {"Body":"body1","From":"from1","To":"to1","Template":"template1"}, {"Body":"body2","From":"from2","To":"to2","Template":"template2"} ] 

This works fine. However, I want to be able to add a Dictionary to my Email class, so it will look like this:

public string Body { get; set; } public string From { get; set; } public string Template { get; set; } public string To { get; set; } public string Type { get; set; } public Dictionary<string, string> HandleBars { get; set; } 

And I changed my request to look like this:

[{ "Body": "body", "From": "from", "To": "to", "Template": "template", "HandleBars": [{ "something": "value" }] }, { "Body": "body1", "From": "from1", "To": "to1", "Template": "template1" }, { "Body": "body2", "From": "from2", "To": "to2", "Template": "template2" }] 

However, when the Post method receives this, all the Email fields are populated, except for the HandleBars dictionary. What do I have to do in order to pass it in correctly? Is my json structured incorrectly?